US20170153380A1 - Liquid crystal display device and method for manufacturing light guiding plate thereof - Google Patents
Liquid crystal display device and method for manufacturing light guiding plate thereof Download PDFInfo
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- US20170153380A1 US20170153380A1 US14/768,813 US201514768813A US2017153380A1 US 20170153380 A1 US20170153380 A1 US 20170153380A1 US 201514768813 A US201514768813 A US 201514768813A US 2017153380 A1 US2017153380 A1 US 2017153380A1
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- light guiding
- guiding plate
- liquid crystal
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0091—Positioning aspects of the light source relative to the light guide
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2202/00—Materials and properties
- G02F2202/28—Adhesive materials or arrangements
Definitions
- the disclosure is related to the field of liquid crystal display, and more particularly to a liquid crystal display device and a method for manufacturing a light guiding plate of the liquid crystal display device.
- a backlight type of liquid crystal display comprises a liquid crystal panel and a backlight module.
- a backlight source is disposed at the edge of a back plate, which is behind the liquid crystal panel, the light emitted from the backlight source enters a light guiding plate (LGP) through an incident surface of the light guiding plate, the light is emitted from an irradiating surface of the light guiding plate after reflection and diffusion, and a surface light source is formed by an optical film assembly and then is provided to the liquid crystal panel.
- LGP light guiding plate
- a surface light source is formed by an optical film assembly and then is provided to the liquid crystal panel.
- the distance between the backlight source and the display region of the liquid crystal panel should meet the requirement of assembling.
- errors cannot be avoided in real practice of assembling, such that the distance between the backlight source and the display region is shorter than the requirement.
- the distance between the backlight source and the incident surface of the light guiding plate is short, such that the light emitted from the backlight source cannot be mixed sufficiently and differences of brightness and color occur, and it further causes Hotspot Mura (the brightness is not uniform) when displaying.
- the disclosure provides a liquid crystal display device and a method for manufacturing a light guiding plate thereof so as to improve the phenomena of Hotspot Mura when displaying.
- a liquid crystal display device comprises a backlight source, a back plate, a light guiding plate disposed on the back plate, an optical film assembly disposed on the light guiding plate, a liquid crystal panel disposed on the optical film assembly, and a frame surrounding the light guiding plate and pressing and fixing the liquid crystal panel to the optical film assembly, wherein the backlight source is disposed between the frame and a lateral surface of the light guiding plate, and the lateral surface of the light guiding plate is an incident surface of the light guiding plate.
- the material of the light guiding plate is glass
- a plurality of first protrusions is disposed on an irradiating surface of the light guiding plate
- a bottom surface of a prism sheet of the optical film assembly is disposed adjacent with the light guiding plate
- a plurality of second protrusions is disposed on the bottom surface of the prism sheet of the optical film assembly
- the plurality of second protrusions and the plurality of first protrusions are alternatively arranged
- translucent adhesives are disposed between each of the first protrusions and two adjacent second protrusions, such that the bottom surface of the prism sheet is fixed with the irradiating surface of the light guiding plate by the translucent adhesive, and a top surface of the optical film assembly is fixed with the liquid crystal panel by the translucent adhesive.
- the light guiding plate has a groove, a bottom surface of the groove is the irradiating surface of the light guiding plate, a sidewall of the groove is parallel to the incident surface of the light guiding plate, and the sidewall of the groove and the incident surface of the light guiding plate are separated by a predetermined thickness.
- groove and the plurality of first protrusions are integrally formed, and the groove and the plurality of first protrusions are formed by etching a rectangular glass substrate by an acid liquid.
- the liquid crystal panel comprises an array substrate and a color film substrate, the color film substrate is disposed closed to the optical film assembly, and an edge of the color film substrate is disposed in the groove
- the liquid crystal display device further comprises a shading tape, such that the color film substrate is relatively fixed with the light guiding plate, one edge of the shading tape abuts the frame, another edge of the shading tape abuts or overlaps with an edge of the optical film assembly, one end of the frame is fixed to the back plate, and another end of the frame is fixed with the array substrate and flushes with an edge of the array substrate.
- a liquid crystal display device comprises a back plate, a light guiding plate disposed on the back plate, an optical film assembly disposed on the light guiding plate, a liquid crystal panel disposed on the optical film assembly, and a frame surrounding the light guiding plate and pressing and fixing the liquid crystal panel to the optical film assembly.
- a plurality of first protrusions is disposed on an irradiating surface of the light guiding plate, a bottom surface of the optical film assembly is disposed adjacent with the light guiding plate, a plurality of second protrusions is disposed on the bottom surface of the optical film assembly, the plurality of second protrusions and the plurality of first protrusions are alternatively arranged, translucent adhesives are disposed between each of the first protrusions and two adjacent second protrusions, such that the bottom surface of the optical film assembly is fixed with the irradiating surface of the light guiding plate by the translucent adhesive.
- the liquid crystal display device further comprises a backlight source, the backlight source is disposed between the frame and a lateral surface of the light guiding plate, and the lateral surface of the light guiding plate is an incident surface of the light guiding plate.
- the optical film assembly comprises a prism sheet, and the prism sheet comprises the plurality of second protrusions.
- the material of the light guiding plate is glass or polycarbonate.
- the light guiding plate has a groove, a bottom surface of the groove is the irradiating surface of the light guiding plate, a sidewall of the groove is parallel to the incident surface of the light guiding plate, and the sidewall of the groove and the incident surface of the light guiding plate are separated by a predetermined thickness.
- groove and the plurality of first protrusions are integrally formed, and the groove and the plurality of first protrusions are formed by etching a rectangular glass substrate by an acid liquid.
- the liquid crystal panel comprises an array substrate and a color film substrate, the color film substrate is disposed closed to the optical film assembly, and an edge of the color film substrate is disposed in the groove
- the liquid crystal display device further comprises a shading tape, such that the color film substrate is relatively fixed with the light guiding plate, one edge of the shading tape abuts the frame, another edge of the shading tape abuts or overlaps with an edge of the optical film assembly, one end of the frame is fixed to the back plate, and another end of the frame is fixed with the array substrate and flushes with an edge of the array substrate.
- a method for manufacturing a light guiding plate of a liquid crystal display device comprises a back plate supporting the light guiding plate, an optical film assembly disposed on the light guiding plate, a liquid crystal panel disposed on the optical film assembly, and a frame surrounding the light guiding plate and pressing and fixing the liquid crystal panel to the optical film assembly, wherein a plurality of first protrusions is disposed on an irradiating surface of the light guiding plate, a bottom surface of the optical film assembly is disposed adjacent with the light guiding plate, a plurality of second protrusions is disposed on the bottom surface of the optical film assembly, the plurality of second protrusions and the plurality of first protrusions are alternatively arranged, translucent adhesives are disposed between each of the first protrusions and two adjacent second protrusions, such that the bottom surface of the optical film assembly is fixed with the irradiating surface of the light guiding plate by the translucent adhesive.
- the method comprises: forming a plurality of grid points having a predetermined shape on a surface of two glass substrates respectively; coating a sealant on another surface opposite to the region of the plurality of grid points on one of the two glass substrates, and aligning the two glass substrates by the sealant; etching another surface of the two glass substrates respectively, such that a groove being formed on the two glass substrates respectively, and a plurality of protrusions being formed on a bottom surface of the grooves.
- the method further comprises: coating a corrosion resistant layer on another surface of the two glass substrates, and the corrosion resistant layer being disposed outside the region of the plurality of grid points; separating the two glass substrates.
- the irradiating surface of the light guiding plate has the plurality of first protrusions
- the bottom surface of the optical film assembly has the plurality of second protrusions
- the plurality of second protrusions and the plurality of first protrusions are alternatively arranged
- the translucent adhesives are disposed between the first protrusions and the second protrusions, such that the optical film assembly is fixed with the light guiding plate. Since the light guiding plate and the backlight source are fixed relatively to the back plate as well as the liquid crystal panel is disposed corresponding to the optical film assembly, such that the relative position between the liquid crystal panel and the backlight source are fixed.
- the distance between the backlight source and the display region of the liquid crystal panel meets the requirement of assembling, such that the distance between the backlight source and the incident surface of the light guiding plate meets the requirement. Therefore, it can ensure that the light emitted from the backlight source be sufficiently mixed and the phenomena of Hotspot Mura can be improved.
- FIG. 1 is a schematic view of the liquid crystal display device according to an embodiment the disclosure
- FIG. 2 is a flow chart of the method for manufacturing the glass light guiding plate according to an embodiment the disclosure
- FIG. 3 is a schematic view of the plurality of gird points formed on the glass substrate according to the disclosure.
- FIG. 4 is a schematic view of the two glass substrates are with each other according to the disclosure.
- FIG. 5 is a schematic view of the first protrusions formed by etching the two glass substrates according to the disclosure
- FIG. 6 is a schematic view of the light guiding plate obtained by separating the two glass substrates according to the disclosure.
- FIG. 7 is a schematic view of the liquid crystal display according to another embodiment of the disclosure.
- FIG. 1 is a schematic view of the liquid crystal display device according to an embodiment the disclosure.
- the liquid crystal display device 10 comprises a backlight module and a liquid crystal panel 14 .
- the backlight module comprises a back plate 11 , a light guiding plate 12 disposed on the back plate 11 , an optical film assembly 13 disposed on the light guiding plate 12 , a liquid crystal panel 14 disposed on the optical film assembly 13 , and a frame 15 surrounding the light guiding plate 12 and pressing and fixing the liquid crystal panel 14 to the optical film assembly 13
- the liquid crystal panel 14 comprises a color film substrate 141 and an array substrate 142
- the array substrate 142 is disposed adjacent with the optical film assembly 13
- the frame 15 has a groove 151 and presses and fixed the liquid crystal panel 14 by the groove 151
- a plurality of first protrusions 121 is disposed on an irradiating surface of the light guiding plate 121
- the optical film assembly 13 comprises a prism sheet and other optical films
- the liquid crystal display device 10 can be an edge light liquid crystal display device as shown in the figure, i.e. a backlight source 17 of the liquid crystal display device 10 is disposed between the frame 15 and a lateral surface of the light guiding plate 12 .
- the lateral surface of the light guiding plate 12 is an incident surface of the light guiding plate 12
- the lateral surface of the light guiding plate 12 is perpendicular with the irradiating surface.
- the backlight source 17 can be a LED light bar.
- the liquid crystal display device 10 can be a bottom light liquid crystal display device, i.e. the backlight source 17 is disposed between the back plate 11 and a bottom surface of the light guiding plate 12 .
- the bottom surface of the light guiding plate 12 is the incident surface of the light guiding plate 12
- the bottom surface of the light guiding plate 12 is opposite to the irradiating surface.
- the plurality of second protrusions 131 and the plurality of first protrusions 121 are alternatively arranged, translucent adhesives are disposed between each of the first protrusions 121 and two adjacent second protrusions 131 .
- the translucent adhesives can be OCA (Optically Clear Adhesive, a special translucent adhesive).
- the liquid crystal panel 14 Since the light guiding plate 12 and the backlight source 17 are relatively fixed with the back plate 11 , and the liquid crystal panel 14 is disposed corresponding to the prism sheet, the liquid crystal panel 14 is also fixed with a top surface of the optical film assembly 13 by the translucent adhesive, such that the distance between the liquid crystal panel 14 and the backlight source 17 is fixed.
- the distance A′ between the backlight source 17 and the active area (AA) of the liquid crystal panel 14 equals to the distance of the requirement, and the distance would not be shorter because of the errors caused in assembling.
- the distance between the backlight source 17 and the incident surface of the light guiding plate 12 meets the requirement. Therefore, it can ensure that the light emitted from the backlight source 17 can be sufficiently mixed, the differences of brightness and color can be greatly decreased, as well as the phenomena of Hotspot Mura when displaying can be improved.
- the embodiment can greatly increase the distance between LEDs on the backlight source 17 , such that the amount of LEDs on the backlight source 17 can be decreased and the cost can be lowered.
- the material of the light guiding plate 12 can be polycarbonate (PC or engineering plastics), which is like the present technique.
- the material of the light guiding plate 12 can be glass. Since the diffusion of light in glass is better than PC, a point light source should be converted to a face light source as well as the same uniformity should be achieved.
- the path of refraction of the glass light guiding plate 12 is shorter than the path of refraction of the PC light guiding plate 12 , such that the thickness of the light guiding plate 12 can be decreased when glass is used, and the thickness of the backlight module can be decreased.
- FIG. 2 is a flow chart of the method for manufacturing the glass light guiding plate according to an embodiment the disclosure. As shown in FIG. 2 , the method for manufacturing the glass light guiding plate 12 comprises:
- Step S 21 forming a plurality of grid points having a predetermined shape on a surface of two glass substrates respectively.
- a plurality of protruded and transparent grid points (frequency adjusting points or light diffusion points) having identical sizes can be printed on the two transparent glass substrates 31 by screen printing, wherein the grid points 32 can be ball-shaped as shown in the figure, or square-shaped.
- Step S 22 coating a sealant on another surface opposite to the region of the plurality of grid points on one of the two glass substrates, and aligning the two glass substrates by the sealant.
- a sealant 33 is coated outside the region of the plurality of grid points 32 , i.e. the sealant 33 is disposed at the edge of the two glass substrates 31 .
- the sealant 33 can seal the two glass substrates 31 .
- Step S 23 etching another surface of the two glass substrates respectively, such that a groove being formed on the two glass substrates respectively, and a plurality of protrusions being formed on a bottom surface of the grooves.
- the two glass substrates 31 can be dipped into a HF (hydrofluoric acid) solution, such that a plurality of first protrusions 121 can be formed by etching.
- a HF hydrofluoric acid
- the light guiding plate 12 in this embodiment can further has a groove 122 as shown in FIGS. 1 and 5 , such that a predetermined thickness between the groove 122 and the incident surface of the light guiding plate 12 can support the liquid crystal panel 14 , the optical film assembly 13 can be disposed in the groove 122 , as well as the plurality of first protrusions 121 can be disposed on the bottom surface of the groove 122 .
- the groove 122 and the plurality of first protrusions 121 can be integrally formed, i.e.
- the groove 122 and the plurality of first protrusions 121 are obtained by etching the rectangular glass substrate 31 by an acid solution. Specifically, before the step of etching another surface of the two glass substrates 31 respectively, as shown in FIG. 4 , a corrosion resistant layer 34 can be coated on another surface of the two glass substrates 31 , wherein the corrosion resistant layer 34 is disposed outside the region of the plurality of grid points 32 . While forming the plurality of first protrusions 121 by etching, the region which is covered by the corrosion resistant layer 34 would not be etched.
- the material of the corrosion resistant layer 34 can be identical with the material of the sealant 33 , for example, thermoplastic sealant. In some other embodiments, the corrosion resistant layer 34 can be made by other materials.
- Step S 24 separating the two glass substrates.
- the two glass substrates 31 can be heated, such that the thermoplastic sealant 33 can be softened. Then, the two glass substrates 31 are separated and the light guiding plate 12 is obtained. When the size of the two glass substrates 31 are larger than the expected size, the two glass substrates 31 can be cut in advance, such that the size of the glass substrate 31 after cutting can meet the requirement of the light guiding plate 12 , and then they are separated under heating.
- FIG. 7 is a schematic view of the liquid crystal display according to another embodiment of the disclosure.
- the color film substrate 141 is disposed adjacent with the optical film assembly 13 (or the light guiding plate 12 ), and an edge of the color film substrate 141 is supported in the groove 122 of the light guiding plate 12 .
- one edge of the shading tape 18 which can shade light, abuts the frame 15
- another edge of the shading tape 18 abuts or overlaps with an edge of the optical film assembly 13 , such that it can prevent the outer lead bonding (OLB) of the liquid crystal display device 10 from leaking light
- the color film substrate 141 can be fixed with the light guiding plate 12 by the adhesives of the shading tape 18 .
- the liquid crystal panel 14 can be fixed to the irradiating surface of the light guiding plate 12 while the frame 15 does not need the groove 151 as shown in FIG. 1 . Accordingly, the frame 15 flushes with the edge of the array substrate 142 , such that the thickness of the frame 15 can be greatly decreased and it is beneficial for the designs of narrow frame and non-frame of liquid crystal display devices 10 .
- liquid crystal display devices in FIGS. 1 and 7 are used for exemplify the embodiments of the disclosure, and other embodiments can be referred with present technique.
Abstract
The disclosure provides a liquid crystal display device and a method for manufacturing a light guiding plate thereof. Wherein, multiple first protrusions are disposed on an irradiating surface of the light guiding plate, a prism sheet of an optical film assembly is disposed adjacent with the light guiding plate, multiple of second protrusions are disposed on the prism sheet of the optical film assembly, the second protrusions and the first protrusions are alternatively arranged, and translucent adhesives are disposed between each of the first protrusions and two adjacent second protrusions, such that the prism sheet is fixed with the light guiding plate. The disclosure can improve the phenomena of Hotspot Mura when displaying and decrease the thickness of the backlight module, such that it is beneficial for the designs of narrow frame and non-frame of liquid crystal display devices.
Description
- The disclosure is related to the field of liquid crystal display, and more particularly to a liquid crystal display device and a method for manufacturing a light guiding plate of the liquid crystal display device.
- A backlight type of liquid crystal display (LCD) comprises a liquid crystal panel and a backlight module. As an edge light backlight module, a backlight source is disposed at the edge of a back plate, which is behind the liquid crystal panel, the light emitted from the backlight source enters a light guiding plate (LGP) through an incident surface of the light guiding plate, the light is emitted from an irradiating surface of the light guiding plate after reflection and diffusion, and a surface light source is formed by an optical film assembly and then is provided to the liquid crystal panel. In order to ensure the displaying quality of the liquid crystal display device, it is important to ensure that the light emitted from the backlight source is sufficiently mixed. Specifically, the distance between the backlight source and the display region of the liquid crystal panel should meet the requirement of assembling. However, errors cannot be avoided in real practice of assembling, such that the distance between the backlight source and the display region is shorter than the requirement. Thus, the distance between the backlight source and the incident surface of the light guiding plate is short, such that the light emitted from the backlight source cannot be mixed sufficiently and differences of brightness and color occur, and it further causes Hotspot Mura (the brightness is not uniform) when displaying.
- Accordingly, the disclosure provides a liquid crystal display device and a method for manufacturing a light guiding plate thereof so as to improve the phenomena of Hotspot Mura when displaying.
- According to an embodiment of the disclosure, a liquid crystal display device is provided. The liquid crystal display device comprises a backlight source, a back plate, a light guiding plate disposed on the back plate, an optical film assembly disposed on the light guiding plate, a liquid crystal panel disposed on the optical film assembly, and a frame surrounding the light guiding plate and pressing and fixing the liquid crystal panel to the optical film assembly, wherein the backlight source is disposed between the frame and a lateral surface of the light guiding plate, and the lateral surface of the light guiding plate is an incident surface of the light guiding plate. Wherein the material of the light guiding plate is glass, a plurality of first protrusions is disposed on an irradiating surface of the light guiding plate, a bottom surface of a prism sheet of the optical film assembly is disposed adjacent with the light guiding plate, a plurality of second protrusions is disposed on the bottom surface of the prism sheet of the optical film assembly, the plurality of second protrusions and the plurality of first protrusions are alternatively arranged, translucent adhesives are disposed between each of the first protrusions and two adjacent second protrusions, such that the bottom surface of the prism sheet is fixed with the irradiating surface of the light guiding plate by the translucent adhesive, and a top surface of the optical film assembly is fixed with the liquid crystal panel by the translucent adhesive.
- Wherein the light guiding plate has a groove, a bottom surface of the groove is the irradiating surface of the light guiding plate, a sidewall of the groove is parallel to the incident surface of the light guiding plate, and the sidewall of the groove and the incident surface of the light guiding plate are separated by a predetermined thickness.
- Wherein the groove and the plurality of first protrusions are integrally formed, and the groove and the plurality of first protrusions are formed by etching a rectangular glass substrate by an acid liquid.
- Wherein the liquid crystal panel comprises an array substrate and a color film substrate, the color film substrate is disposed closed to the optical film assembly, and an edge of the color film substrate is disposed in the groove, the liquid crystal display device further comprises a shading tape, such that the color film substrate is relatively fixed with the light guiding plate, one edge of the shading tape abuts the frame, another edge of the shading tape abuts or overlaps with an edge of the optical film assembly, one end of the frame is fixed to the back plate, and another end of the frame is fixed with the array substrate and flushes with an edge of the array substrate.
- According to another embodiment of the disclosure, a liquid crystal display device is provided. The liquid crystal display device comprises a back plate, a light guiding plate disposed on the back plate, an optical film assembly disposed on the light guiding plate, a liquid crystal panel disposed on the optical film assembly, and a frame surrounding the light guiding plate and pressing and fixing the liquid crystal panel to the optical film assembly. Wherein a plurality of first protrusions is disposed on an irradiating surface of the light guiding plate, a bottom surface of the optical film assembly is disposed adjacent with the light guiding plate, a plurality of second protrusions is disposed on the bottom surface of the optical film assembly, the plurality of second protrusions and the plurality of first protrusions are alternatively arranged, translucent adhesives are disposed between each of the first protrusions and two adjacent second protrusions, such that the bottom surface of the optical film assembly is fixed with the irradiating surface of the light guiding plate by the translucent adhesive.
- Wherein the liquid crystal display device further comprises a backlight source, the backlight source is disposed between the frame and a lateral surface of the light guiding plate, and the lateral surface of the light guiding plate is an incident surface of the light guiding plate.
- Wherein the optical film assembly comprises a prism sheet, and the prism sheet comprises the plurality of second protrusions.
- Wherein the material of the light guiding plate is glass or polycarbonate.
- Wherein the light guiding plate has a groove, a bottom surface of the groove is the irradiating surface of the light guiding plate, a sidewall of the groove is parallel to the incident surface of the light guiding plate, and the sidewall of the groove and the incident surface of the light guiding plate are separated by a predetermined thickness.
- Wherein the groove and the plurality of first protrusions are integrally formed, and the groove and the plurality of first protrusions are formed by etching a rectangular glass substrate by an acid liquid.
- Wherein the liquid crystal panel comprises an array substrate and a color film substrate, the color film substrate is disposed closed to the optical film assembly, and an edge of the color film substrate is disposed in the groove, the liquid crystal display device further comprises a shading tape, such that the color film substrate is relatively fixed with the light guiding plate, one edge of the shading tape abuts the frame, another edge of the shading tape abuts or overlaps with an edge of the optical film assembly, one end of the frame is fixed to the back plate, and another end of the frame is fixed with the array substrate and flushes with an edge of the array substrate.
- Wherein a top surface of the optical film assembly is fixed with the liquid crystal panel by the translucent adhesive.
- According to another embodiment of the disclosure, a method for manufacturing a light guiding plate of a liquid crystal display device is provided. The liquid crystal display device comprises a back plate supporting the light guiding plate, an optical film assembly disposed on the light guiding plate, a liquid crystal panel disposed on the optical film assembly, and a frame surrounding the light guiding plate and pressing and fixing the liquid crystal panel to the optical film assembly, wherein a plurality of first protrusions is disposed on an irradiating surface of the light guiding plate, a bottom surface of the optical film assembly is disposed adjacent with the light guiding plate, a plurality of second protrusions is disposed on the bottom surface of the optical film assembly, the plurality of second protrusions and the plurality of first protrusions are alternatively arranged, translucent adhesives are disposed between each of the first protrusions and two adjacent second protrusions, such that the bottom surface of the optical film assembly is fixed with the irradiating surface of the light guiding plate by the translucent adhesive. The method comprises: forming a plurality of grid points having a predetermined shape on a surface of two glass substrates respectively; coating a sealant on another surface opposite to the region of the plurality of grid points on one of the two glass substrates, and aligning the two glass substrates by the sealant; etching another surface of the two glass substrates respectively, such that a groove being formed on the two glass substrates respectively, and a plurality of protrusions being formed on a bottom surface of the grooves.
- Wherein before the step of etching another surface of the two glass substrates respectively, the method further comprises: coating a corrosion resistant layer on another surface of the two glass substrates, and the corrosion resistant layer being disposed outside the region of the plurality of grid points; separating the two glass substrates.
- According to the liquid crystal display device and the method for manufacturing the light guiding plate thereof of the disclosure, the irradiating surface of the light guiding plate has the plurality of first protrusions, the bottom surface of the optical film assembly has the plurality of second protrusions, the plurality of second protrusions and the plurality of first protrusions are alternatively arranged, and the translucent adhesives are disposed between the first protrusions and the second protrusions, such that the optical film assembly is fixed with the light guiding plate. Since the light guiding plate and the backlight source are fixed relatively to the back plate as well as the liquid crystal panel is disposed corresponding to the optical film assembly, such that the relative position between the liquid crystal panel and the backlight source are fixed. Thus, the distance between the backlight source and the display region of the liquid crystal panel meets the requirement of assembling, such that the distance between the backlight source and the incident surface of the light guiding plate meets the requirement. Therefore, it can ensure that the light emitted from the backlight source be sufficiently mixed and the phenomena of Hotspot Mura can be improved.
- In order to more clearly illustrate the embodiments of the disclosure, the accompanying drawings for illustrating the technical solutions and the technical solutions of the disclosure are briefly described as below.
-
FIG. 1 is a schematic view of the liquid crystal display device according to an embodiment the disclosure; -
FIG. 2 is a flow chart of the method for manufacturing the glass light guiding plate according to an embodiment the disclosure; -
FIG. 3 is a schematic view of the plurality of gird points formed on the glass substrate according to the disclosure; -
FIG. 4 is a schematic view of the two glass substrates are with each other according to the disclosure; -
FIG. 5 is a schematic view of the first protrusions formed by etching the two glass substrates according to the disclosure; -
FIG. 6 is a schematic view of the light guiding plate obtained by separating the two glass substrates according to the disclosure; and -
FIG. 7 is a schematic view of the liquid crystal display according to another embodiment of the disclosure. - The following description with reference to the accompanying drawings is provided to clearly and completely explain the exemplary embodiments of the disclosure. It is apparent that the following embodiments are merely some embodiments of the disclosure rather than all embodiments of the disclosure. According to the embodiments in the disclosure, all the other embodiments attainable by those skilled in the art without creative endeavor belong to the protection scope of the disclosure.
-
FIG. 1 is a schematic view of the liquid crystal display device according to an embodiment the disclosure. As shown inFIG. 1 , the liquidcrystal display device 10 comprises a backlight module and aliquid crystal panel 14. The backlight module comprises aback plate 11, alight guiding plate 12 disposed on theback plate 11, anoptical film assembly 13 disposed on thelight guiding plate 12, aliquid crystal panel 14 disposed on theoptical film assembly 13, and aframe 15 surrounding thelight guiding plate 12 and pressing and fixing theliquid crystal panel 14 to theoptical film assembly 13, wherein theliquid crystal panel 14 comprises acolor film substrate 141 and anarray substrate 142, thearray substrate 142 is disposed adjacent with theoptical film assembly 13, theframe 15 has agroove 151 and presses and fixed theliquid crystal panel 14 by thegroove 151, a plurality offirst protrusions 121 is disposed on an irradiating surface of thelight guiding plate 121, theoptical film assembly 13 comprises a prism sheet and other optical films, a bottom surface of the prism sheet is disposed adjacent with the irradiating surface of thelight guiding plate 12, and a plurality ofsecond protrusions 131 is disposed on the bottom surface of the prism sheet. - According to the embodiment, the liquid
crystal display device 10 can be an edge light liquid crystal display device as shown in the figure, i.e. abacklight source 17 of the liquidcrystal display device 10 is disposed between theframe 15 and a lateral surface of thelight guiding plate 12. The lateral surface of thelight guiding plate 12 is an incident surface of thelight guiding plate 12, and the lateral surface of thelight guiding plate 12 is perpendicular with the irradiating surface. Wherein, thebacklight source 17 can be a LED light bar. However, in some other embodiments, the liquidcrystal display device 10 can be a bottom light liquid crystal display device, i.e. thebacklight source 17 is disposed between theback plate 11 and a bottom surface of thelight guiding plate 12. In those embodiments, the bottom surface of thelight guiding plate 12 is the incident surface of thelight guiding plate 12, and the bottom surface of thelight guiding plate 12 is opposite to the irradiating surface. - When assembling the liquid
crystal display device 10, the plurality ofsecond protrusions 131 and the plurality offirst protrusions 121 are alternatively arranged, translucent adhesives are disposed between each of thefirst protrusions 121 and two adjacentsecond protrusions 131. For example, the translucent adhesives can be OCA (Optically Clear Adhesive, a special translucent adhesive). Thus, the bottom surface of the prism sheet is fixed with the irradiating surface of thelight guiding plate 12 by the translucent adhesive. Since thelight guiding plate 12 and thebacklight source 17 are relatively fixed with theback plate 11, and theliquid crystal panel 14 is disposed corresponding to the prism sheet, theliquid crystal panel 14 is also fixed with a top surface of theoptical film assembly 13 by the translucent adhesive, such that the distance between theliquid crystal panel 14 and thebacklight source 17 is fixed. Thus, the distance A′ between thebacklight source 17 and the active area (AA) of theliquid crystal panel 14 equals to the distance of the requirement, and the distance would not be shorter because of the errors caused in assembling. Thus, the distance between thebacklight source 17 and the incident surface of thelight guiding plate 12 meets the requirement. Therefore, it can ensure that the light emitted from thebacklight source 17 can be sufficiently mixed, the differences of brightness and color can be greatly decreased, as well as the phenomena of Hotspot Mura when displaying can be improved. - In other words, based on the combination of present liquid crystal display devices, which cannot avoid the phenomena of Hotspot Mura, and common knowledge in the technical field that the phenomena of Hotspot Mura would become worse when the ratio of the distance between the backlight source and the display region of the liquid crystal panel to the distance between two LEDs on the backlight source is smaller, one can understand that the embodiment can greatly increase the distance between LEDs on the
backlight source 17, such that the amount of LEDs on thebacklight source 17 can be decreased and the cost can be lowered. - Referring to
FIG. 1 again, the material of thelight guiding plate 12 can be polycarbonate (PC or engineering plastics), which is like the present technique. In some other embodiments, the material of thelight guiding plate 12 can be glass. Since the diffusion of light in glass is better than PC, a point light source should be converted to a face light source as well as the same uniformity should be achieved. The path of refraction of the glasslight guiding plate 12 is shorter than the path of refraction of the PClight guiding plate 12, such that the thickness of thelight guiding plate 12 can be decreased when glass is used, and the thickness of the backlight module can be decreased. -
FIG. 2 is a flow chart of the method for manufacturing the glass light guiding plate according to an embodiment the disclosure. As shown inFIG. 2 , the method for manufacturing the glasslight guiding plate 12 comprises: - Step S21: forming a plurality of grid points having a predetermined shape on a surface of two glass substrates respectively.
- Also referring to
FIG. 3 , a plurality of protruded and transparent grid points (frequency adjusting points or light diffusion points) having identical sizes can be printed on the twotransparent glass substrates 31 by screen printing, wherein the grid points 32 can be ball-shaped as shown in the figure, or square-shaped. - Step S22: coating a sealant on another surface opposite to the region of the plurality of grid points on one of the two glass substrates, and aligning the two glass substrates by the sealant.
- Also referring to
FIG. 4 , asealant 33 is coated outside the region of the plurality of grid points 32, i.e. thesealant 33 is disposed at the edge of the twoglass substrates 31. When the twoglass substrates 31 are aligned with each other, thesealant 33 can seal the twoglass substrates 31. - Step S23: etching another surface of the two glass substrates respectively, such that a groove being formed on the two glass substrates respectively, and a plurality of protrusions being formed on a bottom surface of the grooves.
- Also referring to
FIG. 5 , the twoglass substrates 31 can be dipped into a HF (hydrofluoric acid) solution, such that a plurality offirst protrusions 121 can be formed by etching. - In order to avoid the
liquid crystal panel 14 directly pressing to theoptical film assembly 13 and damaging the fragileoptical film assembly 13, thelight guiding plate 12 in this embodiment can further has agroove 122 as shown inFIGS. 1 and 5 , such that a predetermined thickness between thegroove 122 and the incident surface of thelight guiding plate 12 can support theliquid crystal panel 14, theoptical film assembly 13 can be disposed in thegroove 122, as well as the plurality offirst protrusions 121 can be disposed on the bottom surface of thegroove 122. Wherein, thegroove 122 and the plurality offirst protrusions 121 can be integrally formed, i.e. thegroove 122 and the plurality offirst protrusions 121 are obtained by etching therectangular glass substrate 31 by an acid solution. Specifically, before the step of etching another surface of the twoglass substrates 31 respectively, as shown inFIG. 4 , a corrosionresistant layer 34 can be coated on another surface of the twoglass substrates 31, wherein the corrosionresistant layer 34 is disposed outside the region of the plurality of grid points 32. While forming the plurality offirst protrusions 121 by etching, the region which is covered by the corrosionresistant layer 34 would not be etched. The material of the corrosionresistant layer 34 can be identical with the material of thesealant 33, for example, thermoplastic sealant. In some other embodiments, the corrosionresistant layer 34 can be made by other materials. - Step S24: separating the two glass substrates.
- Referring to
FIGS. 5 and 6 , the twoglass substrates 31 can be heated, such that thethermoplastic sealant 33 can be softened. Then, the twoglass substrates 31 are separated and thelight guiding plate 12 is obtained. When the size of the twoglass substrates 31 are larger than the expected size, the twoglass substrates 31 can be cut in advance, such that the size of theglass substrate 31 after cutting can meet the requirement of thelight guiding plate 12, and then they are separated under heating. -
FIG. 7 is a schematic view of the liquid crystal display according to another embodiment of the disclosure. The difference between the above embodiment and this embodiment is that thecolor film substrate 141 is disposed adjacent with the optical film assembly 13 (or the light guiding plate 12), and an edge of thecolor film substrate 141 is supported in thegroove 122 of thelight guiding plate 12. In addition, one edge of theshading tape 18, which can shade light, abuts theframe 15, and another edge of theshading tape 18 abuts or overlaps with an edge of theoptical film assembly 13, such that it can prevent the outer lead bonding (OLB) of the liquidcrystal display device 10 from leaking light, and thecolor film substrate 141 can be fixed with thelight guiding plate 12 by the adhesives of theshading tape 18. Thus, theliquid crystal panel 14 can be fixed to the irradiating surface of thelight guiding plate 12 while theframe 15 does not need thegroove 151 as shown inFIG. 1 . Accordingly, theframe 15 flushes with the edge of thearray substrate 142, such that the thickness of theframe 15 can be greatly decreased and it is beneficial for the designs of narrow frame and non-frame of liquidcrystal display devices 10. - It should be noticed that the liquid crystal display devices in
FIGS. 1 and 7 are used for exemplify the embodiments of the disclosure, and other embodiments can be referred with present technique. - Note that the specifications relating to the above embodiments should be construed as exemplary rather than as limitative of the present disclosure. The equivalent variations and modifications on the structures or the process by reference to the specification and the drawings of the disclosure, or application to the other relevant technology fields directly or indirectly should be construed similarly as falling within the protection scope of the disclosure.
Claims (14)
1. A liquid crystal display device, comprising:
a backlight source;
a back plate;
a light guiding plate, disposed on the back plate;
an optical film assembly, disposed on the light guiding plate;
a liquid crystal panel, disposed on the optical film assembly; and
a frame, surrounding the light guiding plate and pressing and fixing the liquid crystal panel to the optical film assembly, wherein the backlight source is disposed between the frame and a lateral surface of the light guiding plate, and the lateral surface of the light guiding plate is an incident surface of the light guiding plate;
wherein the material of the light guiding plate is glass, a plurality of first protrusions is disposed on an irradiating surface of the light guiding plate, a bottom surface of a prism sheet of the optical film assembly is disposed adjacent with the light guiding plate, a plurality of second protrusions is disposed on the bottom surface of the prism sheet of the optical film assembly, the plurality of second protrusions and the plurality of first protrusions are alternatively arranged, translucent adhesives are disposed between each of the first protrusions and two adjacent second protrusions, such that the bottom surface of the prism sheet is fixed with the irradiating surface of the light guiding plate by the translucent adhesive, and a top surface of the optical film assembly is fixed with the liquid crystal panel by the translucent adhesive.
2. The liquid crystal display device according to claim 1 , wherein the light guiding plate has a groove, a bottom surface of the groove is the irradiating surface of the light guiding plate, a sidewall of the groove is parallel to the incident surface of the light guiding plate, and the sidewall of the groove and the incident surface of the light guiding plate are separated by a predetermined thickness.
3. The liquid crystal display device according to claim 2 , wherein the groove and the plurality of first protrusions are integrally formed, and the groove and the plurality of first protrusions are formed by etching a rectangular glass substrate by an acid liquid.
4. The liquid crystal display device according to claim 2 , wherein the liquid crystal panel comprises an array substrate and a color film substrate, the color film substrate is disposed closed to the optical film assembly, and an edge of the color film substrate is disposed in the groove, the liquid crystal display device further comprises a shading tape, such that the color film substrate is relatively fixed with the light guiding plate, one edge of the shading tape abuts the frame, another edge of the shading tape abuts or overlaps with an edge of the optical film assembly, one end of the frame is fixed to the back plate, and another end of the frame is fixed with the array substrate and flushes with an edge of the array substrate.
5. A liquid crystal display device, comprising:
a back plate;
a light guiding plate, disposed on the back plate;
an optical film assembly, disposed on the light guiding plate;
a liquid crystal panel, disposed on the optical film assembly; and
a frame, surrounding the light guiding plate and pressing and fixing the liquid crystal panel to the optical film assembly;
wherein a plurality of first protrusions is disposed on an irradiating surface of the light guiding plate, a bottom surface of the optical film assembly is disposed adjacent with the light guiding plate, a plurality of second protrusions is disposed on the bottom surface of the optical film assembly, the plurality of second protrusions and the plurality of first protrusions are alternatively arranged, translucent adhesives are disposed between each of the first protrusions and two adjacent second protrusions, such that the bottom surface of the optical film assembly is fixed with the irradiating surface of the light guiding plate by the translucent adhesive.
6. The liquid crystal display device according to claim 5 , wherein the liquid crystal display device further comprises a backlight source, the backlight source is disposed between the frame and a lateral surface of the light guiding plate, and the lateral surface of the light guiding plate is an incident surface of the light guiding plate.
7. The liquid crystal display device according to claim 5 , wherein the optical film assembly comprises a prism sheet, and the prism sheet comprises the plurality of second protrusions.
8. The liquid crystal display device according to claim 5 , wherein the material of the light guiding plate is glass or polycarbonate.
9. The liquid crystal display device according to claim 8 , wherein the light guiding plate has a groove, a bottom surface of the groove is the irradiating surface of the light guiding plate, a sidewall of the groove is parallel to the incident surface of the light guiding plate, and the sidewall of the groove and the incident surface of the light guiding plate are separated by a predetermined thickness.
10. The liquid crystal display device according to claim 9 , wherein the groove and the plurality of first protrusions are integrally formed, and the groove and the plurality of first protrusions are formed by etching a rectangular glass substrate by an acid liquid.
11. The liquid crystal display device according to claim 9 , wherein the liquid crystal panel comprises an array substrate and a color film substrate, the color film substrate is disposed closed to the optical film assembly, and an edge of the color film substrate is disposed in the groove, the liquid crystal display device further comprises a shading tape, such that the color film substrate is relatively fixed with the light guiding plate, one edge of the shading tape abuts the frame, another edge of the shading tape abuts or overlaps with an edge of the optical film assembly, one end of the frame is fixed to the back plate, and another end of the frame is fixed with the array substrate and flushes with an edge of the array substrate.
12. The liquid crystal display device according to claim 5 , wherein a top surface of the optical film assembly is fixed with the liquid crystal panel by the translucent adhesive.
13. A method for manufacturing a light guiding plate of a liquid crystal display device, wherein the liquid crystal display device comprises a back plate supporting the light guiding plate, an optical film assembly disposed on the light guiding plate, a liquid crystal panel disposed on the optical film assembly, and a frame surrounding the light guiding plate and pressing and fixing the liquid crystal panel to the optical film assembly, wherein a plurality of first protrusions is disposed on an irradiating surface of the light guiding plate, a bottom surface of the optical film assembly is disposed adjacent with the light guiding plate, a plurality of second protrusions is disposed on the bottom surface of the optical film assembly, the plurality of second protrusions and the plurality of first protrusions are alternatively arranged, translucent adhesives are disposed between each of the first protrusions and two adjacent second protrusions, such that the bottom surface of the optical film assembly is fixed with the irradiating surface of the light guiding plate by the translucent adhesive, wherein the method comprises:
forming a plurality of grid points having a predetermined shape on a surface of two glass substrates respectively;
coating a sealant on another surface opposite to the region of the plurality of grid points on one of the two glass substrates, and aligning the two glass substrates by the sealant;
etching another surface of the two glass substrates respectively, such that a groove being formed on the two glass substrates respectively, and a plurality of protrusions being formed on a bottom surface of the grooves; and
separating the two glass substrates.
14. The method according to claim 13 , wherein before the step of etching another surface of the two glass substrates respectively, the method further comprises:
coating a corrosion resistant layer on another surface of the two glass substrates, and the corrosion resistant layer being disposed outside the region of the plurality of grid points.
Applications Claiming Priority (3)
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CN201510407802.9A CN104965344B (en) | 2015-07-10 | 2015-07-10 | The manufacturing method of liquid crystal display device and its light guide plate |
CN201510407802.9 | 2015-07-10 | ||
PCT/CN2015/084322 WO2017008314A1 (en) | 2015-07-10 | 2015-07-17 | Liquid crystal display device and manufacturing method for light guide plate thereof |
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US20170153380A1 true US20170153380A1 (en) | 2017-06-01 |
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US14/768,813 Abandoned US20170153380A1 (en) | 2015-07-10 | 2015-07-17 | Liquid crystal display device and method for manufacturing light guiding plate thereof |
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CN105632346B (en) * | 2016-03-08 | 2019-02-01 | 青岛海信电器股份有限公司 | A kind of display device |
US11150516B2 (en) | 2016-04-05 | 2021-10-19 | Saturn Licensing Llc | Display and electronic apparatus |
CN105700049B (en) * | 2016-04-26 | 2018-11-30 | 京东方科技集团股份有限公司 | A kind of prismatic lens and preparation method thereof, backlight module and VR display device |
CN106681048A (en) * | 2017-01-19 | 2017-05-17 | 京东方科技集团股份有限公司 | Display module and preparation method thereof and liquid crystal displayer |
CN107065259A (en) * | 2017-03-14 | 2017-08-18 | 惠科股份有限公司 | A kind of display panel and display device |
CN108458280B (en) * | 2018-02-23 | 2021-01-29 | 重庆京东方光电科技有限公司 | Backlight assembly, assembling method thereof and display device |
CN113219659B (en) * | 2018-08-15 | 2022-07-29 | 华为技术有限公司 | Display device |
CN114815386A (en) * | 2022-03-25 | 2022-07-29 | 京东方科技集团股份有限公司 | Backlight module, display device and preparation method of display module |
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Also Published As
Publication number | Publication date |
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WO2017008314A1 (en) | 2017-01-19 |
CN104965344A (en) | 2015-10-07 |
CN104965344B (en) | 2018-09-11 |
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